4.—(1) Subject to regulations 7 and 15, no person shall place on the market any new engine, whether or not already installed in machinery, unless the requirements of paragraph (2) have been complied with in relation to it.
(2) The requirements in respect of any engine are that—
(a)the approval authority has issued a type approval certificate,
(b)the engine conforms to the requirements of the type approval, and
(c)the engine has affixed to it markings in accordance with regulation 11(1), including the type approval number.